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Finding the Fourth Proportional to 70,823.78, 106,250.83 and 28,703.38

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Solution

The fourth proportional to 70,823.78, 106,250.83 and 28,703.38 is: 43,061.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,823.78 : 106,250.83 = 28,703.38 : x
  2. Step 2: Convert to fraction form
    70,823.78/106,250.83 = 28,703.38/x
  3. Step 3: Cross multiply
    70,823.78x = 106,250.83 × 28,703.38
  4. Step 4: Simplify right side
    70,823.78x = 3,049,757,948.81
  5. Step 5: Solve for x
    x = 3,049,757,948.81/70,823.78
  6. Step 6: Final answer
    x = 43,061.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.